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Performance of PPP Enhanced by Wide-Area Tropospheric Delay Model with Different Inter-Station Spacings
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Yumei FANG1, Wujiao DAI1, *, Lin PAN1, Jiabao PAN2, Zhiguo PANG3
Journal of Geodesy and Geodynamics | 2026, 46(2) : 227 - 233
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Journal of Geodesy and Geodynamics | 2026, 46(2): 227-233
Performance of PPP Enhanced by Wide-Area Tropospheric Delay Model with Different Inter-Station Spacings
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Yumei FANG1, Wujiao DAI1, *, Lin PAN1, Jiabao PAN2, Zhiguo PANG3
Affiliations
  • 1 School of Geosciences and Info-physics, Central South University, Changsha 410083, China
  • 2 Fuzhou Investigation and Surveying Institute, Fuzhou 350108, China
  • 3 China Institute of Water Resources and Hydropower Research, Beijing 100038, China
Published: 2026-02-15 doi: 10.14075/j.jgg.2025.03.064
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The tropospheric delay information of the enhanced precise point positioning (PPP) comes from a small regional reference station network with station spacing of several tens of kilometers, which has the disadvantages of limited service scope and high construction cost. To investigate the impact of wide-area tropospheric delay models with larger station spacing on PPP augmentation performance, observational data from IGS tracking stations in Europe were used to establish tropospheric delay models with average inter-station spacings of approximately 200 km, 260 km, 320 km, and 380 km. These models were then compared with the GPT3 model to evaluate and analyze PPP enhancement performance. The results indicate that the wide-area tropospheric delay models with inter-station spacings of 200 km, 260 km, and 320 km all reduced PPP convergence time to varying degrees, with particularly notable improvements in the height component and its maximum enhancement can reach 39.8%. However, the enhancement effect diminished as average station spacing increased. When the station spacing reached 380 km, the PPP augmentation performance was inferior to that of the global GPT3 model.

tropospheric  /  precise point positioning (PPP)  /  convergence time  /  inter-station spacing
方玉妹, 戴吾蛟, 潘林, 潘家宝, 庞治国. 不同站间距广域对流层延迟模型对PPP增强性能分析. 大地测量与地球动力学, 2026 , 46 (2) : 227 -233 . DOI: 10.14075/j.jgg.2025.03.064
Yumei FANG, Wujiao DAI, Lin PAN, Jiabao PAN, Zhiguo PANG. Performance of PPP Enhanced by Wide-Area Tropospheric Delay Model with Different Inter-Station Spacings[J]. Journal of Geodesy and Geodynamics, 2026 , 46 (2) : 227 -233 . DOI: 10.14075/j.jgg.2025.03.064
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Year 2026 volume 46 Issue 2
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Article Info
doi: 10.14075/j.jgg.2025.03.064
  • Receive Date：2025-03-05
  • Online Date：2026-10-29
  • Published：2026-02-15
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  • Received：2025-03-05
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Affiliations
    1 School of Geosciences and Info-physics, Central South University, Changsha 410083, China
    2 Fuzhou Investigation and Surveying Institute, Fuzhou 350108, China
    3 China Institute of Water Resources and Hydropower Research, Beijing 100038, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
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Genus		 种数
Number of
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Percentage of total
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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